Press the button with the "+" on the WLAN box from wingo and within 2 minutes press the button with the "+" on the WLAN box as well. They should then connect automatically.
If this does not work, reset the WLAN box and start again from the beginning.
It is described on page 2 of the instructions:
https://www.swisscom.ch/content...en français:
https://www.swisscom.ch/content...